COMMON MISTAKES IN STATISTICS – SPOTTING THEM AND AVOIDING THEM Part IV Mistakes Involving Regression Dividing a Continuous Variable into Categories Suggestions
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: COMMON MISTAKES IN STATISTICS – SPOTTING THEM AND AVOIDING THEM Part IV Mistakes Involving Regression Dividing a Continuous Variable into Categories Suggestions
COMMON MISTAKES IN STATISTICS – SPOTTING THEM AND AVOIDING THEM Part IV Mistakes Involving Regression Dividing a Continuous Variable into Categories Suggestions
1NOTES FOR SUMMER STATISTICS INSTITUTE COURSECOMMON MISTAKES IN STATISTICS -SPOTTING THEM AND AVOIDING THEMPart IV:Mistakes Involving Regression Divid COMMON MISTAKES IN STATISTICS – SPOTTING THEM AND AVOIDING THEM Part IV Mistakes Involving Regression Dividing a Continuous Variable into Categories Suggestionsding a Continuous Variable into Categories SuggestionsMAY 24-27, 2010Instructor: Martha K. Smith2CONTENTS OF PART IVCommon Mistakes in Regression Related toModel Assumptions3A. Over-fitting4Avoiding over-fitting9B. Using confidence intervals whenprediction intervals are needed11c. Over-interpreting COMMON MISTAKES IN STATISTICS – SPOTTING THEM AND AVOIDING THEM Part IV Mistakes Involving Regression Dividing a Continuous Variable into Categories Suggestionshigh R216D. Mistakes in interpretation of coefficients181.Interpreting a coefficient as a rate ofchange in Y instead of as a rate of changein the condCOMMON MISTAKES IN STATISTICS – SPOTTING THEM AND AVOIDING THEM Part IV Mistakes Involving Regression Dividing a Continuous Variable into Categories Suggestions
itional mean of Y182. Not taking confidence intervals forcoefficients into account203. Interpreting a coefficient that is notstatistically significant1NOTES FOR SUMMER STATISTICS INSTITUTE COURSECOMMON MISTAKES IN STATISTICS -SPOTTING THEM AND AVOIDING THEMPart IV:Mistakes Involving Regression Divid COMMON MISTAKES IN STATISTICS – SPOTTING THEM AND AVOIDING THEM Part IV Mistakes Involving Regression Dividing a Continuous Variable into Categories Suggestionsficients22E. Mistakes in selecting terms231. Assuming linearity is preserved whenvariables are dropped232. Problems with stepwise modelselection procedures24Dividing a Continuous Variable into Categories27Suggestions32For researchers32Planning research32 COMMON MISTAKES IN STATISTICS – SPOTTING THEM AND AVOIDING THEM Part IV Mistakes Involving Regression Dividing a Continuous Variable into Categories Suggestions1NOTES FOR SUMMER STATISTICS INSTITUTE COURSECOMMON MISTAKES IN STATISTICS -SPOTTING THEM AND AVOIDING THEMPart IV:Mistakes Involving Regression DividGọi ngay
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